Key-lock for bearing elements.



J. MALIOKI.

KEY LOU-K FOR BEARING ELEMENTS.

APPLICATION FILED NOR/13,1913.

mwsmu Patented Sept; 8, 1914.

UNITED STATES PATENT OFFICE.

JOSEPH MALIG or CHICAGO, rumors, Ass'IeNoIt USO-TEMPLETON, KENLY & 00., LTD., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

KEY-LOCK FOR BEARING nrnmnn'rs.

Specification of Letters Patent.

Patented Sept. 8, 1914.

To all whom it may concern:

Be it known that I, Josnrn MALICKI, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements inKey-Locks for Bearing Elements, of which the following a specification.

This invention relates to improvements in bearings, and has reference more particularly to a new and improved construction of key lock for shaft elements employed in plain bearings.

The chief intended application of my invention is in connection with lifting jacks,

and more particularly the bearings of the actuating arm or lever in the frame of the jack. In devices of this kind it is customary to provide the bearing of the pintle of the actuating lever with a hardened steel bush ing to reduce the wear and increase the longevity of this part of the device. Heretofore considerable difliculty has been experienced in securely locking these bushings in place against both a rotative and end- Wise movable tendency.

The object of the invention is to provide a bushing lock of increased simplicity and superior efiiciency'to those heretofore employed for this purpose.

More specifically, the object sought by the invention is to provide a readily applicable and removable key lock which will securely lock the bushing to the'bearing against both rotary and endwise movement and which, at the same time, may be readily removed to permit of .therepair or renewal of arts.

My invention, as applied to a lifting jack,

is illustrated in the accompanying drawing,

in which- Figure 1 is a fra mentary view of the upper portion of a hfting jack, showing the casing in vertical section, and having my improved key lock applied thereto. Fig. 2 is an enlarged front elevation of the casing with the actuating lever and its socket base removed, and showing one side of the bearing in longitudinal section. Fig. 3 is an enlarged side elevational detail of the casing, in cross-section through one side of the bearin Fig. 4 is a detail perspectiveelevation of the right-hand bushing. Fig. 5 is a detail perspective elevation of the key lock that cooperates with the bushing shown in Fi 4. Fig. 6 is a fragmentary top plan View 0 the inner portion of the lever socket member which carries the lever fulcrum pin.

Referring to the drawings, 10 designates the upper portion of the hollow frame of a lifting jack, of the general type shown in Letters Patent No. 961,909 granted to W. B. Templeton June 21, 1910. 11 is the usual ratchet bar slidably mounted in the cas1ng;,l2 is the actuating lever, and 13 the metal lever socket member formed with a seat 14 for the upper or lifting pawl 15, and with a cam 16 for forcing the lower or dogging pawl 17 into place on the down stroke of the lever 12. The lever socket 13 is further tformed with laterally extending pintles 18 forming the fLllCIUJIl of the lever.

On the-front portion of the casing 10 are cast a pair of cylindrical bearings 19, into the outer ends of which may be readily driven cup-shaped bushings 20 that receive the pintles 18 of the lever socket member 13.

The upper sides of the bearings 19 are cut away at their inner ends to form openings 21, through which the fulcrum pintles 18 can be introduced to correct position within the bearing members 19. Each bushing 20 is formed with a pair of transverse grooves 22 located on opposite sides of .an axial plane of the bushing and preferably in endwise opposed relation to each other. Preferably, and as herein shown, these grooves 22 are disposed at an angle to each other; and when the bushing is in place within the bearing 19 the adjacent ends of the grooves 22 register with the opening 21, lying just inwardly of the opposite side walls of said opening, as clearly shown in Fig. 3. The grooves v22 are of a width somewhat less than the width of the opening 21 in the axial direction of the bearing member; and, preferably, there is formed between the ad- ]acent ends of the grooves 22 a radial aperture 23 which serves both as an outer wall and as a means for equally centering the bushing (by means of a suitable tool entered therein) when the bushing" has been entered within the bearing, 19.

Fig. 5 shows in detail the key lock. This consists of a strip of metal suitably bent to provide a U-shaped head 24, the sides of which are of a width substantially coextensive with the width-of the opening 21 in the axial direction of the bearing member, and a pair of somewhat narrower prongs 25 forming integral extensions of the sides of the head 24; said prongs being of a width suitable to snugly engage grooves 22 of the bushing. \Vhen the parts, with the exception of the key, have been assembled in the relative positions shown in Figs. 2 and 3, a

key, such as that shown in Fig. 5, is then entered through the opening 21, with the free ends of the prongs 25 at the outer ends of the grooves 22. By means of a hammer the key is driven inwardly, and in this op-.-

eration the prongs 25 are splayed outwardly to a close'fit within the grooves 22. The key.

ment. Nevertheless, by means of a hammer and cold chisel the key may be readily pried out for purposes of oiling the bearing or replacing the bushing.

Although I have described the invention asembodied in a liftin jack, it will be evident to those skilled in the art -that it is equally capable of useful application in other devices employing a bushing member normally liable to endwise displacement or rotary movement or both. Hence, I do not limit the invention to the specific application thereof herein shown and described.

I claim- 1. The combination with an annular bear: ing member having an opening formed through its wall, of a shaft element fitted to said bearing member and formed with a pair of transverse key grooves disposed on opposite sides of an axial plane of said element and at one end registering with said opening inwardly of the opposite side walls of the latter, and a key member having a head portion substantially fitting said opening and a pair of prongs engaging said grooves.

2. The combination, with an annular bearing member having an opening formed through its wall, of a bushing fitted to said bearing member and formed with a pair of transverse keygrooves disposed on opposite sides of an axial plane of said bushing, said key grooves lying at an angle to each other with their adjacent ends registering with said opening inwardly of the opposite side walls of the latter, and a key member having a head portion substantially fitting said opening and a pair of outwardly splayed prongs engaging said grooves.

3. The combination, with an annular bearing member having an opening formed through its wall, of a bushing fitted to said bearing member and formed with a pair of oppositely disposed transverse key grooves lying at an angle to each other with their adj acent ends registering with said opening inwardly of the opposite side walls of the latter, said rooves having a width less than the width 0% said opening in the axial directionof said bearing member, and a key member having a U-shaped head portion substantially. fitting and filling said opening, and a pair of outwardly splayed prongs forming narrowed extensions of the sides of said head portion and engaging said grooves.

4. The combination, with an annular bearing member having anopening formed through its wall, of a bushing fitted to said bearingmember and formed with apair of oppositely disposed transverse key grooves at one end' registering with said opening inwardly of the opposite side walls of the latter, and further formed with a radial aperture between the adjacent ends of. said key grooves, and a key member-having a hollow head portion substantially fitting said opening and a pair of prongs engaging said grooves.

JOSEPH MALICKI. Witnesses:

WALTER B. TEMPLETON, SAMUEL N. Pom). 

